Technical review of dry FGD systems and economic evaluation of spray dryer FGD systems. Final report May 79-Nov 80
The report gives results of an extensive study of dry flue gas desulfurization (FGD) systems, involving dry injection of absorbents or spray drying. (The study was undertaken because they appear to have both process and economic advantages over wet FGD.) Design concepts (e.g., type of absorbent and atomizer, approach to flue gas saturation temperature, and particulate collection method) remain to be demonstrated at full scale. Most vendors prefer a lime slurry system with rotary atomizers and fabric filter particulate collection, while all systems now under contract to utilities apply to low-sulfur coal. SO/sub 2/ removal efficiencies sufficient for high-sulfur coal applications at stable operating conditions and economically feasible absorbent utilization rates have not yet been demonstrated. In conceptual design cost comparisons based on a new 500-MW utility power generation unit, a lime spray dryer/fabric filter combination had lower capital investments and annual revenue requirements for 0.7% sulfur western coal and both 0.7 and 3.5% sulfur eastern coal than a wet limestone scrubbing process. With lignite fuel, similar cost advantages were evident for dry (relative to wet) FGD. The capital investment advantage of dry over wet FGD increased with increasing coal sulfur content.
- Research Organization:
- Tennessee Valley Authority, Muscle Shoals, AL (USA). Div. of Energy Demonstrations and Technology
- OSTI ID:
- 5478107
- Report Number(s):
- PB-81-206476
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
01 COAL, LIGNITE, AND PEAT
DESULFURIZATION
ECONOMIC ANALYSIS
FLUE GAS
FOSSIL-FUEL POWER PLANTS
AIR POLLUTION CONTROL
ABSORPTION
CAPITALIZED COST
COMBUSTION PRODUCTS
DESIGN
FILTRATION
INDUSTRIAL WASTES
PARTICLES
SCRUBBERS
SPRAY DRYING
SULFUR DIOXIDE
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
COST
DRYING
ECONOMICS
EQUIPMENT
GASEOUS WASTES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
SEPARATION PROCESSES
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
010800 - Coal
Lignite
& Peat- Waste Management